net/dsa/dsa_priv.h

   1 /*
   2  * net/dsa/dsa_priv.h - Hardware switch handling
   3  * Copyright (c) 2008-2009 Marvell Semiconductor
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  */
  10
  11 #ifndef __DSA_PRIV_H
  12 #define __DSA_PRIV_H
  13
  14 #include <linux/list.h>
  15 #include <linux/phy.h>
  16 #include <linux/timer.h>
  17 #include <linux/workqueue.h>
  18 #include <net/dsa.h>
  19
  20 struct dsa_switch {
  21         /*
  22          * Parent switch tree, and switch index.
  23          */
  24         struct dsa_switch_tree  *dst;
  25         int                     index;
  26
  27         /*
  28          * Configuration data for this switch.
  29          */
  30         struct dsa_chip_data    *pd;
  31
  32         /*
  33          * The used switch driver.
  34          */
  35         struct dsa_switch_driver        *drv;
  36
  37         /*
  38          * Reference to mii bus to use.
  39          */
  40         struct mii_bus          *master_mii_bus;
  41
  42         /*
  43          * Slave mii_bus and devices for the individual ports.
  44          */
  45         u32                     dsa_port_mask;
  46         u32                     phys_port_mask;
  47         struct mii_bus          *slave_mii_bus;
  48         struct net_device       *ports[DSA_MAX_PORTS];
  49 };
  50
  51 struct dsa_switch_tree {
  52         /*
  53          * Configuration data for the platform device that owns
  54          * this dsa switch tree instance.
  55          */
  56         struct dsa_platform_data        *pd;
  57
  58         /*
  59          * Reference to network device to use, and which tagging
  60          * protocol to use.
  61          */
  62         struct net_device       *master_netdev;
  63         __be16                  tag_protocol;
  64
  65         /*
  66          * The switch and port to which the CPU is attached.
  67          */
  68         s8                      cpu_switch;
  69         s8                      cpu_port;
  70
  71         /*
  72          * Link state polling.
  73          */
  74         int                     link_poll_needed;
  75         struct work_struct      link_poll_work;
  76         struct timer_list       link_poll_timer;
  77
  78         /*
  79          * Data for the individual switch chips.
  80          */
  81         struct dsa_switch       *ds[DSA_MAX_SWITCHES];
  82 };
  83
  84 static inline bool dsa_is_cpu_port(struct dsa_switch *ds, int p)
  85 {
  86         return !!(ds->index == ds->dst->cpu_switch && p == ds->dst->cpu_port);
  87 }
  88
  89 static inline u8 dsa_upstream_port(struct dsa_switch *ds)
  90 {
  91         struct dsa_switch_tree *dst = ds->dst;
  92
  93         /*
  94          * If this is the root switch (i.e. the switch that connects
  95          * to the CPU), return the cpu port number on this switch.
  96          * Else return the (DSA) port number that connects to the
  97          * switch that is one hop closer to the cpu.
  98          */
  99         if (dst->cpu_switch == ds->index)
 100                 return dst->cpu_port;
 101         else
 102                 return ds->pd->rtable[dst->cpu_switch];
 103 }
 104
 105 struct dsa_slave_priv {
 106         /*
 107          * The linux network interface corresponding to this
 108          * switch port.
 109          */
 110         struct net_device       *dev;
 111
 112         /*
 113          * Which switch this port is a part of, and the port index
 114          * for this port.
 115          */
 116         struct dsa_switch       *parent;
 117         u8                      port;
 118
 119         /*
 120          * The phylib phy_device pointer for the PHY connected
 121          * to this port.
 122          */
 123         struct phy_device       *phy;
 124 };
 125
 126 struct dsa_switch_driver {
 127         struct list_head        list;
 128
 129         __be16                  tag_protocol;
 130         int                     priv_size;
 131
 132         /*
 133          * Probing and setup.
 134          */
 135         char    *(*probe)(struct mii_bus *bus, int sw_addr);
 136         int     (*setup)(struct dsa_switch *ds);
 137         int     (*set_addr)(struct dsa_switch *ds, u8 *addr);
 138
 139         /*
 140          * Access to the switch's PHY registers.
 141          */
 142         int     (*phy_read)(struct dsa_switch *ds, int port, int regnum);
 143         int     (*phy_write)(struct dsa_switch *ds, int port,
 144                              int regnum, u16 val);
 145
 146         /*
 147          * Link state polling and IRQ handling.
 148          */
 149         void    (*poll_link)(struct dsa_switch *ds);
 150
 151         /*
 152          * ethtool hardware statistics.
 153          */
 154         void    (*get_strings)(struct dsa_switch *ds, int port, uint8_t *data);
 155         void    (*get_ethtool_stats)(struct dsa_switch *ds,
 156                                      int port, uint64_t *data);
 157         int     (*get_sset_count)(struct dsa_switch *ds);
 158 };
 159
 160 /* dsa.c */
 161 extern char dsa_driver_version[];
 162 void register_switch_driver(struct dsa_switch_driver *type);
 163 void unregister_switch_driver(struct dsa_switch_driver *type);
 164
 165 /* slave.c */
 166 void dsa_slave_mii_bus_init(struct dsa_switch *ds);
 167 struct net_device *dsa_slave_create(struct dsa_switch *ds,
 168                                     struct device *parent,
 169                                     int port, char *name);
 170
 171 /* tag_dsa.c */
 172 netdev_tx_t dsa_xmit(struct sk_buff *skb, struct net_device *dev);
 173
 174 /* tag_edsa.c */
 175 netdev_tx_t edsa_xmit(struct sk_buff *skb, struct net_device *dev);
 176
 177 /* tag_trailer.c */
 178 netdev_tx_t trailer_xmit(struct sk_buff *skb, struct net_device *dev);
 179
 180
 181 #endif